JPH0452082B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention is intended to restore the aeration and drainage properties of hardened soil around the roots of crops such as fruit trees, and to improve the soil quality. Penetrate the air blowing rod into the soil,
This relates to a device for blowing out pressurized air from below to swell and soften the soil, and further spraying soil conditioners such as fertilizer and lime from the air blowing rod.

[Prior Art and its Problems] Conventionally, as this type of control device, attempts have been made to apply fertilizer using compressed air that is ejected from an air blowing rod penetrated into the soil to expand and soften the soil. However, the air and fertilizer ejected from the air blowing rod's nozzle tend to flow back into the air blowing rod from the nozzle due to the pressure of the soil caused by the fall of cultivated soil at the time of ejection, and if used for a long period of time, There was a problem in which backflowing fertilizer adhered to the outlet of the air blowing rod and the passageway leading to it, clogging the passageway.

In addition, as described in Japanese Patent Application Laid-open No. 56-5004, there were also methods in which compressed air was blown into multiple injection pipes to crush the soil, and fertilizers and soil conditioners were injected into the crushed remains. However, this device rotates the main control valve one notch at a time to drive the injection pipe,
This involves a series of operations such as cracking, powder injection, pipe removal, and valve operation powder supply.As there is a sequence to the process, compressed air is used to crack the injection pipe that has been driven into the soil, and fertilizer is applied to the injection pipe in an orderly manner. There was a problem with poor operability when ejecting was repeatedly performed in random order.

[Means for Solving the Problems] The present invention is proposed in view of the above problems, and for this purpose, the following technical measures have been taken.

That is, an air outlet is formed at the lower part of the air blowing rod of the cultivating body which is vertically movably supported by the working machine frame, and an air blowing circuit is communicated with the air outlet, and the fertilizer tank supported by the working machine frame is connected to the air outlet. A state in which the fertilizer pressure feeding circuit is connected to the air jetting circuit, and a state in which the connecting switching body is connected only to the air jetting valve by a switching operation lever provided on the machine body, and a state in which the connecting switching body is connected to the air jetting valve and the fertilizer sending valve. The air jet valve alone or the air jet valve and the fertilizer delivery valve are opened at the same time via the connecting switching body at each of the above positions using the jet control lever provided on the body side. The structure is such that it can be operated.

[Embodiment and its operation] An embodiment of the present invention will be described below based on the drawings.

First, to explain the structure, a work equipment frame 4 is connected to the rear of the agricultural tractor body 1 via a three-point link mechanism 3 that can be raised and lowered by lift arms 2, 2.
The front end is attached to the crossbeam 5, and the rear end thereof is bent upward and the air cylinders 7, 7 are attached thereto in a horizontal row.

A mounting plate 8 is provided horizontally above the air cylinders 7, 7, and a unit mounting frame 11 for mounting the compressor 9 and fertilizer tank 10 is provided on this mounting plate 8, and the cross beam 5 and unit mounting frame 11 are connected to form a mast. 12, and a guide frame 14 that guides and supports the tiller 13 in a vertically movable manner is fixed to one of the right and left sides of the crossbeam 5.

A support plate 15 with a hole in the center of the lower part is fixed to the guide frame 14, and a pneumatic cylinder 1 is attached to the side of the support plate 15.
A lift mechanism 18 consisting of a piston 6 and a piston 17 is provided, and the lift mechanism 18 is configured to lift the cultivating body 13 after completion of driving.

The cultivating body 13 has an air chamber 19 at the top,
An air blowing rod 20 projecting downward is fitted into the lower part, and a known air hammer mechanism (not shown) is connected to the upper end of the air blowing rod 20 between the air chamber 19 and the air blowing rod 20. A hammer piston 21, which constitutes a part of the hammer piston 21, is fitted so as to be slidable in the vertical direction. The upper inlet 24 of the auxiliary chamber 23 formed by the partition wall 22 in line with the hammer piston 21 is connected to the air chamber 19, and the lower outlet 25 is connected to the air jet ports 26, 26 of the air blowing rod 20. An air blowing valve 28 which normally closes the inlet 24 by a spring 27 inserted in the upper part is inserted so as to be positioned vertically, and its lower end protrudes downward;
A metering chamber 30 is formed at the upper end of the bottom wall 29 of the auxiliary chamber 23, and in a normal state, the metering chamber 30 is
The fertilizer delivery valve 32, which communicates with the fertilizer tank 10 and is isolated from the auxiliary chamber 23, is inserted so as to be positioned in the vertical direction so that its lower end protrudes downward, and furthermore, the air injection valve 28 and the fertilizer delivery valve 32 are inserted.
A double-acting pneumatic cylinder 34 having a 4-port 2-position switching solenoid valve 33 on the upper side is arranged side by side with the piston rod 35 projecting downward.

A switching link 36 is fixed to the lower end of the switching link 36.
It is configured so that it can be selectively switched between a state in which the valve is connected only to the air jet valve 28 and a state in which it is connected to the air jet valve 28 and the fertilizer delivery valve 32 at the same time. Specifically, it is configured to rotate around the piston rod 35 to switch.

A tension spring 37 is tensioned between the outer wall and one side of the switching link 36 so that the switching link 36 is placed in a position where it can be connected to the air jet valve 28 under normal conditions. It is connected via a wire 39 to a switching operation lever 38 provided in the.

Between the air cylinders 7, 7 and the cultivating body 13, the air cylinders 7, 7 and the air outlet 2 of the air blowing rod 20 are provided.
6, 26, and an air jet valve 2 in the middle.
8, and a cross beam 5 of the work machine frame 4 branched from the circuit 40 and connected to the horizontal beam 5 of the work machine frame 4.
The 3-port 2-position system releases the compressed air of the pneumatic cylinder 16 of the lift mechanism 18 to the atmosphere by the ground sensing operation of the ground sensor 41 pivotably supported by the ground sensor 41, and allows the compressed air to pass through the pneumatic cylinder 16 by non-grounding operation. valve 4
2, a pneumatic lift circuit 43 interposed with the air blowing circuit 40, a fertilizer pressure feeding circuit 44 branched from the air blowing circuit 40 and communicating with the fertilizer tank 10, and a fertilizer feeding circuit 44 branched from the air blowing circuit 40 and connected to the ground sensor 41 for ground sensing operation. Therefore, a 3-port, 2-position valve 4 communicates with the hammer piston 21 of the air hammer mechanism so as to allow compressed air to flow therein, and shuts off the communication by non-grounding operation.
Compressed air is supplied to the hammer piston 21 while the tiller 5 and tiller 13 descend into the soil to a predetermined depth, but when the predetermined depth is reached, the restraining cam 46 provided on the guide frame 14 A pneumatic hammer circuit 48 is constructed in which a 2-port 2-position valve 47 that blocks the flow of compressed air is inserted in series.

The fertilizer tank 10 is composed of a hopper part 49 and a lower tank part 49a, and a motor 50 installed on the upper surface drives an agitator 51 of the hopper part 49, and a shutter 52 is installed between the hopper part 49 and the lower tank part 49a. It is set up.

The lower tank portion 49a has an open end of a fertilizer pumping circuit 53 that faces the end of the fertilizer pumping circuit 44 and communicates with the fertilizer delivery valve 32.

54 is a universal joint that drives compressor 9 with power from fuselage 1, 55 is 4 port 2
The jet control lever 56 for switching the position solenoid valve 33 is a tension spring.

Next, the action will be explained. To expand and soften the soil in the field, drive the PTO of the machine body 1 and operate the hydraulic control lever of the machine body 1 while keeping the compressor 9 in operation to lower the soil conditioner, as shown in Figure 3. As shown, when the ground sensor 41 protruding from the lower part of the work equipment frame 4 is grounded, it retreats against the tension spring 56 to switch the 3-port 2-position valves 42 and 45, and the lift mechanism 18 is activated. The compressed air in the pneumatic cylinder 16 is released to the atmosphere, and the compressed air in the air cylinder 7 is sent to the air hammer mechanism, and the hammer piston 2
The tiller 13 is lowered along the guide frame 14 of the working machine frame 4 by penetrating the air blowing rod 20 into the ground while applying shock vibration to the air blowing rod 20 through the air blowing rod 1.

When the air blowing rod 20 reaches a predetermined depth, the 2-port 2-position valve 47 is pressed by the check cam body 46 of the guide frame 14, and the hammer piston 2
The compressed air to 1 is stopped to stop the impact vibration of the air blowing rod 20.

Next, the jet control lever 55 is operated to energize the 4-port, 2-position solenoid valve 33 and the compressed air is passed through the lower part of the double-acting pneumatic cylinder 34, whereby the piston rod 35 is raised and the switching link 36 is activated to jet air. Since the valve 28 is opened, the compressed air passes through the auxiliary chamber 23 and is ejected from the air outlets 26, 26 of the air blowing rod 20 to swell and soften the soil around the air blowing rod 20.

Next, after returning the jetting control lever 55 and lowering the piston rod 35 to stop the jetting of compressed air, the switching operation lever 38 is operated so that the switching link 36 rotates toward the fertilizer delivery valve 32 side. , when the ejection control lever 55 is operated again to raise the piston rod 35, the fertilizer delivery valve 3
The fertilizer filled in the metering chamber 30 of No. 2 is fed into the auxiliary chamber 23, and the air jet valve 2
8 is opened and the fertilizer is ejected and diffused together with compressed air from the air outlets 26, 26 into the expanded soft soil. Then, by returning the jetting control lever 55 and the switching operation lever 38, the air jetting valve 28 closes the upper inlet 24 of the auxiliary chamber 23 to stop the flow of compressed air, and the fertilizer delivery valve 32 is lowered to release the amount of the fertilizer. The fertilizer in the fertilizer tank 10 is filled into the chamber 30 via the fertilizer pumping circuit 53 by air blown out from the fertilizer pumping circuit 44 .

Then, when the hydraulic control lever of the machine body 1 is operated to raise the soil improvement device, the ground sensor 41 rotates out of contact with the ground, operates the 3-port 2-position valves 42 and 45, and connects the lift pneumatic circuit 43. Along with letting
The pneumatic hammer circuit 48 is shut off. Then, the aircraft 1 is advanced next to it, and after going through the above series of operation steps,
Tillage and fertilization work is carried out one after another.

[Effects of the Invention] As described above, the present invention forms an air outlet at the lower part of the air blowing rod of the tiller which is vertically movably supported on the work machine frame, communicates the air blowing circuit with the air outlet, and , the fertilizer pumping circuit of the fertilizer tank supported by the work machine frame is connected to the air jetting circuit, and the connecting switching body is connected only to the air jetting valve by the switching operation lever provided on the machine body, and the air jetting It is configured so that it can be selectively switched between the state in which it is connected to the air jet valve and the fertilizer delivery valve, and the air jet valve is connected to only the air jet valve or the air Since the spout valve and the fertilizer delivery valve are configured to be opened simultaneously, compressed air is spewed out from the air blowing rod by the switching operation of the link switching body in conjunction with the operation of the switching operation lever and the jetting control lever. The soil can be expanded and softened to improve aeration, and then the fertilizer can be injected into the expanded and soft soil together with compressed air.
When a blockage occurs in the air blowing rod, only compressed air can be sent to blow off the deposits inside the air blowing rod, and as a result,
There is no clogging in the air blowing rod, and fertilizers, etc. can be spread and spread well on expanded soft soil.

In addition, since the switching operation by the linked switching body can be performed selectively using the switching operation lever,
It is easy to operate, and the connecting switching body can be used as it is to simultaneously open and operate the air blowing valve, or the air blowing valve and the fertilizer delivery valve, making it a simple and inexpensive soil improvement device. It is possible to provide

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, in which Fig. 1 is an overall side view, Fig. 2 is an overall perspective view, Fig. 3 is an overall pneumatic circuit diagram, Fig. 4 is a bottom view of main parts, and Fig. 5 is a sectional view taken along the line A-A in Fig. 4, Fig. 6 is a sectional view taken along the line B-B in Fig. 4, Fig. 7 is an action diagram, and Fig. 8 shows the relationship between the fertilizer pumping circuit and the fertilizer delivery pipe. It is a diagram. Explanation of symbols 1... Aircraft body, 4... Work equipment frame, 7... Air cylinder, 9... Compressor, 10... Fertilizer tank, 13... Tilling body, 14... Guide frame, 16... Pneumatic cylinder, 20... Air blowing rod, 26... Air jet port, 36...Switching connection body, 40...Air jet circuit, 4
4...Fertilizer pressure feeding circuit, 53...Fertilizer pressure feeding circuit.

Claims (1)

[Claims] 1. An air outlet is formed at the lower part of the air blowing rod of the cultivator that is supported by the work machine frame so as to be able to move up and down, and an air blowout circuit is communicated with this air outlet, and the fertilizer tank supported by the work machine frame is connected to the air outlet. A state where the fertilizer pressure feeding circuit is connected to the air jetting circuit and a switching operation lever provided on the machine body connects the connecting switching body only to the air jetting valve, and a state where the connecting switching body is connected to the air jetting valve and the fertilizer sending valve at the same time. configured so that it can be selectively switched to
The present invention is characterized by a configuration in which only the air jet valve or the air jet valve and the fertilizer delivery valve can be opened and operated simultaneously through the connection switching body at each of the above positions by means of a jet control lever provided on the body side. Soil improvement equipment.